Amberwood is one of my favorite courses, but it is far, far away! 11:30 is hot time without a doubt. When it gets hot, I just don't play. There are lots of other things to do or not do...
After being miserable playing in the summer, or trying to play in the summer, I've decided I'm a fair weather golfer. Once that humidity starts creeping up, air-conditioning is my friend...lol.
You'll adjust to the temp, though you might not want to be outdoors playing when it's in the mid 90's for a bit. Some people aren't bothered by the heat and dampness, others are. You'll decide for yourself and either play or find indoor recreation for the summer.
Oh, I can just imagine your wife's look when she had to walk in this heat, you're lucky you survived....

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